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  Animalia
      Arthropoda
            Insecta
                    Trichoptera
                            Hydropsychidae
                                     Arctopsyche
                                             Arctopsyche brevipennis
                                             Arctopsyche californica
                                             Arctopsyche oregonensis
                                     Cheumatopsyche
                                             Cheumatopsyche geolca
                                             Cheumatopsyche geora
                                             Cheumatopsyche halima
                                             Cheumatopsyche harwoodi
                                             Cheumatopsyche logani
                                             Cheumatopsyche pitella
                                             Cheumatopsyche protera
                                             Cheumatopsyche smithi
                                     Diplectrona
                                             Diplectrona margarita
                                             Diplectrona oaklandensis
                                     Homoplectra
                                             Homoplectra luchia
                                             Homoplectra norada
                                             Homoplectra schuhi
                                             Homoplectra shasta
                                             Homoplectra sierra
                                             Homoplectra spora
                                     Hydropsyche
                                             Hydropsyche abella
                                             Hydropsyche alvata
                                             Hydropsyche andersoni
                                             Hydropsyche bidentata
                                             Hydropsyche dorata
                                             Hydropsyche impula
                                             Hydropsyche intrica
                                             Hydropsyche jewetti
                                             Hydropsyche racona
                                             Hydropsyche reiseni
                                             Hydropsyche toschiae
                                             Hydropsyche vanaca
                                             Hydropsyche winema
                                     Hydropsychodes
                                             Hydropsychodes arizonensis
                                     Leptonema
                                             Leptonema harpagum
                              Macronematinae
                                Macronematini
                                     Amphipsyche
                                             Amphipsyche meridiana
                                Oestropsini
                                     Aethaloptera
                                             Aethaloptera maxima
                                             Aethaloptera sexpunctata
                                     Parapsyche
                                             Parapsyche extensa
                                             Parapsyche spinata
                                     Smicridea
                                             Smicridea anomala
                                             Smicridea bulara
                                             Smicridea sattleri